Liquid applicator device

ABSTRACT

A device for the application of liquids, particularly high viscosity substances, such as glue and the like, comprises a layon member which is inflatable and which is connected to a filling and discharge line for causing the inflation. The device may be used to fill cracks or grooves by placing the lay-on member in the groove or crack and then inflating it. The lay-on member may also include an inner core within the envelope defining a space between the lay-on member and the core for containing the medium to be applied and which will issue from the pores of the member after the lay-on member is inflated.

. l l United States Patent 1 1 11 11 3,748,049 Knupier et al. July 24,1973 LIQUID APPLICATOR DEVICE 3,111,796 11/1963 Meissnor 118/506 x [76]Inventors: Siegfried Knupier, Bernhauser FOREIGN PATENTS OR APPLICATIONSSims Neuhausen; 18,712 3/1928 Netherlands.. 101/41 Hermann Brinkmann, I'm Primary Examiner-Lawrence Charles Neuhausen both of GermanyAttorney-John J. McGlew and Alfred E. Page [22] Filed: Apr. 16, 1971 I21 Appl. No.: 134,767 [571 ABSTRACT A device for the application ofliquids, particularly high 4 v viscosity substances, such as glue andthe like, com- 401/90151 prises a lay on member which is inflatable andwhich is I u I o a I I a u I a o a u I 6 a I a I I I I u I 6 n 6 n I u I6 I a c n n 6 c I [58] Field of Search 401/9; 118/214, 215,

118/254 205 117/9 l0l/4l 138/97 1nflat1on. The devlce may be used tofill cracks or grooves by placing the lay-on member in the groove orcrack and then inflating it. The lay-on member may [56] References cuedalso include an inner core within the envelope defining UNITED STATESPATENTS a space between the lay-on member and the core for 2,810,14510/1957 Forrow 401/9 containing the medium to be applied and which will3,607,361 9/ 1971 Eight 117/95 issue from the pores of the member afterthe lay-on 3,269,421 8/1966 Telford 138/97 member is inflatm 3,335,7008/1967 Di Grado et al.... 118/215 3,301,736 1/1967 Smith 118/506 14Claims, 19 Drawing Figures PATENIELJULPMQIS SHEET 2 UP 4 INVENTORS $5662mm (JP/=22 PAIENHLJL'LQMQH 74 049 SHEEI 3 0F 4 obbofiomiq OO O OO 9 OOlooooooooo 'ooooooooo vIQQQQ 029. Hg 77 F000 1000 I LQQQQJ l LIQUIDAPPLICATOR DEVICE SUMMARY'OF THE INVENTION This invention relates ingeneral to the construction of liquid applicators and in particular to anew and useful applicator particularly for very viscous substances suchas glue which includes an inflatable lay-on member mounted on aconnection for the inflation medium and/or the medium to be applied.

The invention relates particularly to a device for the application ofliquids, in particular high viscosity substances, such as glue and thelike on workpiece area, preferably grooves, slots, bores and the like.In the known devices serving for the wetting of workpiece surfaces it isregarded as a disadvantage that they are often not very useful or notusable at all for applying the substance in question to .inaccessibleareas, especially at recessed locations. In the case of blind bores, forexample, it is often not possible to spread glue, paint or the like onthe entire inner surface. This results in the reduced holding force of apart to be secured by glueing or an imperfect surface protection. Inmany cases, while the entire area in an inaccessible location isprovided with thesubstance to be applied, much of the applied substanceis carried away again as the wetting device is removed, since duringintroduction as well as extraction from the gap or bore to be wetted,

the applicator remains in constant contact with the surfaces thereof. v,

The present invention avoids the disadvantages of the known designs. Inparticular the applicator is to be suitable for wetting or paintingpoorly accessible areas, in particular bores, grooves and the like.Moreover, it is formed so that in spite of movements back and forth orin and out on one and the same path, that is, for example,"when used inconnection with a machine, it does not strip off the substance appliedin one direction of movement during movement in the opposite direction.

The invention is characterized by an elastic, pneuma'tically orhydraulically inflatable lay-on member connected with a filling anddischarge line. This device is Wflted on its outside in the usualmanner, for example, by immersion into a vessel containing the substanceto be applied, then it is introduced, in the slack state, into a slot,gap or bore, then put under pressure and brought in contact with thesurface to be wetted. It then transfers a part of the substance adheringto it.

The device can then be pulled out of the slotor bore either in theslackened or inflated state as needed. A

' partial movement in the inflated state and the remaining movement in aslackened state may be desired in some cases. When wetting or paintingexternal free (exposed) areas by means of an applicator which is movedpast the area, the return movement with the device slackened can takeplace on exactly the same path without danger of wiping thesubstanceaway again. The'device according to the invention is thereforesuitable not only for so-called different areas, but for any normal areaas well.

In a preferred form of embodiment of the invention, the filling anddischarge line is connected with a rigid core portion, penetrating intothe lay-on member, sealingly connected with the latter, and provided atleast at its penetrating portion with at least one flow channel for thehydraulic or pneumatic mediumentering at the surface thereof andconnected to the filling and discahrge line. Said core portion prolongsin a way, by

means of its flow channel or channels, the filling and discharge lineinto the lay-on member. Moreover, in particular when the'lay-on memberis slightly inflated, it can serve as a supporting area for thetransversely applied lay-on member. It is further particularlyadvantageous that at least one channel leads out at the end of the coreportion penetrating farthest into the lay-on member. It is thus insuredthat, when the cavity formed by the lay-on member as the lay-on memberis being sucked empty, the lower lying part of the filling space alsocan be sucked empty despite the resting of the layon member against theportions of the interior core. As the device is being evacuated, thelay-on member places itself before the mouth openings of the coreportion, thereby sealing them; so that further suctioning off of thepressure medium is no longer possible. For this reason provision must bemade that inany desired position of the device at least one internalmouth opening remainsfree until the filling space has been completelyevacuated. It is therefore expedient to provide such outlet bores atseveral points of the core portion, which either all open into a channelor communicate with the filling and discharge line over differentchannels. In particular, the arrangement of such mouth openings at theupper and lower end of the core portion ,is important. Mouth openingsmay also be located in the center of the core portion.

The core'portion is preferably designed as a sword or bag like member orit may be designed as a pin, cylinder, cone or the like. The form to beselected depends on the purpose and type of areas for which the deviceis to be preferably used. In'further development of the invention, thelay-on member is designed in the form of a pot or pocket and isprovidedat its outlet edgewith a circling bead acting as annular seal.The cross-section form .of the lay-on member will advantageously beadapted to the core portion, but it is not absolutely necessary-to takethe same cross-section form for both parts. I

A simplification and eduction of cost of the device can be achieved infurther development of the invention in that the filling line isdesigned at thesame time as a discharge line, alsothe aeration valvefcanstill serve its basic function. As thejpressures are relatively low, asimple valve screw is sufficient here,.which may be equipped with aknurled head for manual operation or it may be hexagonal or the like foroperation with a tool. i

According to a further feature of the invention, the lay-on member ismade of rubber or similar highly elastic material, in particularplastic. On its outer face there are warts, nubs or the like. Theseserve, on the one hand, to enlarge the surface and, on the other, toform depressions by means of which greater wetting of the lay-on'memberis possible. In another very appropriate form of construction the lay-onmember is provided at its outer face with raised, parallel and/orcrossing web s. The purpose of this design is in principle the'same'asin the aforementioned embodiment.

According to another feature of the invention, th device comprises ahandle carrying the filling and/or discharge line as well as theaeration and deaeration valve, which handle is provided furthermore witha pneumatic filling and evacuating pump. The shank of the handle may beused, for example, as cylinder for a piston pump which may bedesigned asa pressure'and- /or vacuum pump.

Another feature of the invention is characterized in that the outer faceof the lay-on member is covered, at least partially, with absorbent foammaterial. The latter is of advantage, in particular, when the utensil isused in connection with a substance of lower viscosity. A sponge typefoam material, in fact, can retain more liquid than for example a merelyroughened surface.

For reasons of safety it is very expedient also that the cavity formedby the core portion and the inner face of the lay-on member isconnectable by means of a relief valve with the outer air, so thatharmful excess pressure can be kept away from the lay-on member. Forthis purpose, an annular packing bead on the lay-on member is sealinglyretained, not at its entire circumference, but only at the greater partthereof. While the remaining retained packing part also rests sealinglyagainst a counterface, it is not pressed against it. As soon as thepressure in the interior reaches a certain maximum value, it lifts thispacking off the contiguous face and permits issuance of the pressuremedium for the duration of the overpressure. It is clear that suchrelief valves are suitable primarily for compressed air-fed devices.

Accordingly, it is an object of the invention to provide an improveddevice for applying a viscous liquid such as glue and which includes anelastic inflatable lay-on member and a fitting connected to the lay-onmember and inflating and discharging the lay-on member.

A further object of the invention is to provide an applicatorparticularly for glue which includes at least one elastic bag likemember and a handle part forming an inlet and outletfor the inflatablemedium and which advantageously also includes an inlet for the medium tobe applied, and wherein the lay-on applicator comprises. either one ortwo bag elements and with the space between the bag elements filled withthe medium to be applied and the inner space inflated to apply pressureto forcethe medium to be applied through the pores of the outer bag likeelement. l v A further object of the invention is to provide a method ofapplying a material such as glue to an inexcessible area such as agroove or recess comprising positioning a bag like applicator into thegroove or recess in a relaxed condition, inflating the applicator tocause itto move into association with the walls bounding the groove orrecess to apply the medium to be applied by pressure contact, thereafterdeflating the applicator at jleast partially to remove it from thesurface of the walls bounding the groove and removing it from thegroove.

A further object of the invention is to provide a device for applying aviscous liquid such as glue and the like which is simple in design,rugged in construction and economical to manufacture.

The various features of novelty which characterize the invention arepointed out with particularity in the claims annexed to and forming apart of this disclosure. For a better understanding of the invention,its operating advantages and specific objects attained by its uses,reference should be had to the accompanying drawing and descriptivematter in which there is illustrated preferred embodiments of theinvention.

BRIEF DESCRIPTION OF THE DRAWING In the drawing:

FIG. 1 is a side elevational view partly broken away of a glueapplicator constructed in accordance with the FIG. 5 is a sectionthrough a groove with the applicator positioned in the groove and inoperating position;

FIGS. 6, 7 and 8 are views similar to FIG. 5 showing various positionsof an applicator in respect to parts which require the application of aliquid thereto;

FIGS. 9, ll, 13 and 15 show partial side elevational views of anapplicator bag;and

FIGS. 10, 12, 14, 16 and 17 show corresponding sectional views ofapplicators indicated in respective FIGS. 9, ll, 13 and 15;

FIG. 18 is a view similar to FIG. 1 of another embodiment of theinvention; and 7 FIG. 19 is a section takenalong the line XIXXIX.

GENERAL DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to thedrawings in particular, the invention embodied therein in FIGS. 1 and 2comprises an applicator device which includes a lay-on member or a bagapplicator generally designated 1 having a core portion 3 which islocated within the lay-on member 1 and is spaced inwardly from theinterior walls thereof. The lay-on member 1 is mounted on a combinationinflation medium inlet and discharge connection-and-handle or guidegenerally designated 5 having an opening 5a for the inlet or outlet ofan inflation'medium such,as air, and containing a deaeration valve 6with a threadable adjustment valve portion 6a. The handle 5 mayadvantageously be engaged by an operators hand and manipulated by anoperator. An inflation fluid such as a liquid or gas may be deliveredthrough the fitting 5 into channels 7 which are defined in core portion3 and which terminate at their outer ends in openings 9 leading into anintermediate space between the outer lay-on member l and the inner core3. When the inflation medium is directed into the space the cavity 11 isfilled and the lay-on member 1,being formed of a highly elastic materialsuch as rubber,will expand to enlarge its outer circumference and moveit intocontact with an area to receive an application of the viscousliquid. This viscous liquid may be coated on the exterior of the lay-onmember 1 or applied by directingit outwardly through pores of the lay-onmembersuch as in the embodiment of FIG. 18 which will be describedhereinafter.

As indicated in FIGS. 9 through 17 the lay-on member 1 may have circularcylindrical nubs 13 arranged in a row as shown in FIGS. 9 and 10. Inthis construction, the nubs of the next following row are offset fromthe previous row. The nubs 14 of the showing of FIGS. 11 and 12 are madewith a larger diameter and they are arranged in horizontal rows.

In the showing of FIGS. 13 and 14, the raised portions of the outersurface of thelay-on member 1 comprises crossing webs 15. These webs areformed by blind bold type depressions 16 arranged in vertical and.horizontal rows.

In FIGS. 15, 16 and 17 two examples of construction on member 1 are alsoformed by webs. In this arrangement, the webs do not cross but are allarranged parallel to each other. In the showing of FIG. 16 the webs areof rectangular cross-section and indicated by the numeral 17, while thewebs 18 shown in FIG. 17 are semicircular in cross-section.

In the embodiment shown in FIGS. 3 through 5 the applicator deviceincludes a lay-on member 2 having a core portion 4 and it includes thesame type combination inlet connection and discharge connection 5 withan aeration valve 6. The interior core 4 includes a single channel -8for the conveyance of the inflation medium such as a gas or a liquidwhich issues through an opening 10 into the space 12. The lay-on member2 is also formed of highly elastic material such as rubber and thereforeas soon as the pressure in the cavity 12 is sufficient, it is inflatedby the gas or the liquid to enlarge its outer surface to permit it toengage for example with interior annular walls 50 or with a bottom wall52 of a part 54 having a groove which is adapted to be coated with asubstance of high viscosity such as glue, paint, lacquer or the like(FIG. 5). The material to be applied is first coated onto the layermember 2 by immersing the lay-on member into the substance.

As shown in FIG. 6,the applicator is positioned so that the lay-onmember 2 is located between two workpieces 32 and .35. By the feeding ofthe pressure medium through the filling and discharge line 5 the lay-onmember becomes inflated to cause it to deposit any material coatedthereon onto the surfaces 33 or 34 when it is inflated. In FIG. 7, acomplete cylindrical groove 38 is shown as being completely filled by anapplicator, wherein the lay-on member 2 completely engages the entiresurface of the blind hole 38. In FIG. 8, a curved surface 37 is shownbeing engaged by a lay on member 2 which clearly indicates how thelay-on member will bend to the configuration tobe covered and thus forma coating over the entire surface. During the inflation time, thesubstance on the lay-on member 2 is applied to the wall surface ortransferred from the surface of the lay-on member to the surface to becoated. After this transfer, the pressure medium is discharged throughthe line '5 or through the deaeration valve 6. This causes the lay-onmember 2 to shrink back to its original form and size so that the devicecan-be moved out of the gap without effort and without again contactingany surface. In order to obtain complete deaeration .or evacuation ofthe cavities 11 or 12 of the embodiments indicated in FIGS. 1 and 2 and3, 4 and 5, respectively, the opening at the end of the inflow cavity'must lie at an end which penetrates deeply into the layon member. Ifthey are located at the center of the core portion or at the end locatedtoward the packing edge 19 there is a danger that upon evacuation'of acavity these openings will be covered and block the channel before thepart of the cavity located at the outer end of the core has beenevacuated.

Both the core portions 3 and 4 of the two embodiments shown in FIGS. 1through 5 comprise a material such as metal or plastic and they includea packing edge 19 for the core 3 and 20 for the'core 4. The respectiveelastic lay-on members 1 and 2 are pulled over the free ends 21 and 22of the respective cores 3 and 4. For this purpose, the lay-on membersinclude encircling beads forming annular packings 23 and 24respectively.

press against a flange 27. At the narrow side areas of the lay-on member1, that is at the upper and lower edges shown in FIG. 1, the bead 23 isnotpressed on. These two points form a certain overpressure safetydeviceby means of which the pressure medium can issue in the directionof arrows 28 as soon as the pressure in cavity 11 assumes animpermissible value.

In the embodiment of FIGS. 3 through 5, the bead 24 of the pot typelay-on member 3 is pressed by means of the cap nut 29 against the collar30. In order to secure this construction against overpressure a reliefvalve (not shown) is provided in the handle piece 31. It may vantageespecially when using the device in connection with a substance of lowerviscosity. It also finds a better hold in the pores or grooves of thedevice to receive the liquid to be applied that would be the case whenribs or other projections are provided.

In the embodiment of the invention indicated in FIGS. 18 and 19 there isprovided aIay-on member having an elastic core 41 which are arrangedtogether to define an inwardly sealed filling space 40 for the medium tobe applied. The exterior of the lay-on member 100 is provided with aporous construction or includes a plurality of passage slots 42 evenlydistributed overits surface. A viscous liquid such as glue, paint orsimilar substance is fed through the feed line 43 into the filling space40 as indicated by the arrow 44. The check valve 45 prevents the flowingback of this medium when the a parts 3 or 4 of the other embodiment andit has channels 47 which are connected to the combined discharge andfilling fitting 5". v I

With the construction of the device asindicated in FIGS. 18 and 19, thelay-on member does not havei'to beimmersed in the. liquid to be appliedfirst but the liquid is supplied through the line43 to the space 40 andit issues out throughthe slots 42 after the lay-on member is inflated.The curved slots 42 act as flap valves and they block the outletapertures if the filling space 40 is pressure-free or almostpressure-free. This is true in particular for highly viscous fluidswhich are to be applied. For thin substances therefore very smallopenings must be provided. Due to the natural elasticity of the materialof the lay-on member 100, the slots 42 will close automatically when thepressure in the space 40 is reduced. In this embodiment when the coreportion 41 is elastic, the sealing from the stiff filling portion 46 istaken over by a bead 48 of the filling portion 46 as well as by anannular bead 49 of the core portion 41 similar to the constructionindicated in FIG. 1.

While specific embodiments of the invention have been shown anddescribed in detail to illustrate the application of the principles ofthe invention, it will be understood that the invention may be embodiedotherwise without departing from such principles.

What is claimed is:

l. A device for the application of liquids, particularly highly viscousliquids such as glue and the like, on workpiece faces, comprising aninflatable elastic bag forming a lay-on member having a surface forcontaining and transferring the liquid to be applied and a fittingconnected to said bag for filling and discharging an inflation mediuminto and out of said bag, a core member extending into said lay-onmember and sealingly engaged at its periphery with said lay-on member,said fitting having a flow channel connection into said core into thespace between said core and said lay-n member.

2. A device according to claim 1, wherein said lay-on member and saidcore are of pocket shaped configuration, said lay-on member extendinginto closely spaced relationship with the interior end of said lay-onmember, said core having a passage extending therethrough for theinflation liquid terminating closely spaced to the interior of saidlay-on member.

3. A device according to claim 2, wherein said core includes at least aportion which is rigid and forms a positioning sword.

4. A device according to claim 2, wherein said core includes a rigidportion forming a pin-like member for positioning the lay-on member.

5. A device for the application of liquids. particularly highly viscousliquids such as glue and the like, on workpiece faces, comprising aninflatable elastic bag forming a lay-on member having a surface forcontaining and transferring the liquid to be applied and a fittingconnected to said bag for filling and discharging an inflation mediuminto and out of said bag, a core extending into said lay-on member andhaving exterior walls spaced slightly from saidlay-on member interiorwalls, said fitting providing means engageable with said core and saidlay-on member and sealing them peripherally, and relief valve means forrelieving the space between said core and said lay-on member to relievethe inflation pressure therefrom if it exceeds a predeterminedvalue.

6. A device according to claim 5 including means connecting into thespace between the core in said layon member for filling said space withthe material to be applied, said lay-on member having at least one corefor the expulsion of the material to be applied therethrough.

7. A device according to claim 6 including valve means for closing theentrance to the space between said core and said lay-on member afterfilling.

8. A device according to claim 1 including a core member with at least ahandle portion of substantially and said lay-on member to inflate saidlay-on member and means for also supplying the material to be applied tothe space between said core and said lay-on member, said lay-on memberhaving a plurality of openings therethrough for the exit of the materialunder the pressure of the inflation medium delivered through saidfitting.

9. A device for the application of liquids, particularly highly viscousliquids such as glue and the like, on workpiece faces, comprising aninflatable elastic bag forming a lay-on member having a coating surfacefor containing and transferring the liquid to be applied and a rigidsupport fitting connected to and adjacent said bag for filling anddischarging an inflation medium into and out of said bag, said fittingcomprising a tubular handle provided with an aeration and deaerationvalve.

10. A device according to claim 9, wherein said layon member comprises arubber material.

11. A device according toclaim 9, wherein said by on member includes aplurality of projections on its surface.

12. A device according to claim 9, wherein said layon member includes aportion with an outer surface with raised parallel ribs. 7

13. A device according to claim 9, wherein at least a portion of theface of said lay-on member is covered with an absorbent foam plastic.

14. A device for the application of liquids, particularly highly viscousliquids such as glue and thelike, on workpiece faces, comprising aninflatable elastic bag forming a lay-on member having a coating surfacefor containing and transferring the liquid to be applied and a rigidsupport fitting connected to and adjacent said bag for filling anddischarging an inflation medium into and out of said bag, said lay-onmember comprising a pocket shaped member having a mouth edge with anencircling bead, said fitting including a handle with a flange engagedwith the encircling bead and forming a seal therewith.

Patent No. 3 8 049 I EDWARD] M.FLETCH-ER,JR*. Actest-ing' Officer UNITEDSTATES PATENT OFFICE I I CER'HFEQATE 0F EQREIC'MQN Dated 1 .1111 24.,-197 3 v rm'em'ofls SIEGFRIED KNUPPERS; ET. AL,

It is certified that error appears in the above-identifier}patent 1 iand that said Letters Patent are hereby corrected as shown Belem:

On the cover sheet, insert [30] Claims F0reign;

Priority Data Germany P 20 18 163.9 4/16/ 70 Signed and sealed this 22ndday of January 19 74;

(SEAL) .A'ttest em ts}

1. A device for the application of liquids, particularly highly viscousliquids such as glue and the like, on workpiece faces, comprising aninflatable elastic bag forming a lay-on member having a surface forcontaining and transferring the liquid to be applied and a fittingconnected to said bag for filling and discharging an inflation mediuminto and out of said bag, a core member extending into said lay-onmember and sealingly engaged at its periphery with said lay-on member,said fitting having a flow channel connection into said core into thespace between said core and said lay-on member.
 2. A device according toclaim 1, wherein said lay-on member and said core are of pocket shapedconfiguration, said lay-on member extending into closely spacedrelationship with the interior end of said lay-on member, said corehaving a passage extending therethrough for the inflation liquidterminating closely spaced to the interior of said lay-on member.
 3. Adevice according to claim 2, wherein said core includes at least aportion which is rigid and forms a positioning sword.
 4. A deviceaccording to claim 2, wherein said core includes a rigid portion forminga pin-like member for positioning the lay-on member.
 5. A device for theapplication of liquids. particularly highly viscous liquids such as glueand the like, on workpiece faces, comprising an inflatable elastic bagforming a lay-on member having a surface for containing and transferringthe liquid to be applied and a fitting connected to said bag for fillingand discharging an inflation medium into and out of said bag, a coreextending into said lay-on member and having exterior walls spacedslightly from said lay-on member interior walls, said fitting providingmeans engageable with said core and said lay-on member and sealing themperipherally, and relief valve means for relieving the space betweensaid core and said lay-on member to relieve the iNflation pressuretherefrom if it exceeds a predetermined value.
 6. A device according toclaim 5 including means connecting into the space between the core insaid lay-on member for filling said space with the material to beapplied, said lay-on member having at least one core for the expulsionof the material to be applied therethrough.
 7. A device according toclaim 6 including valve means for closing the entrance to the spacebetween said core and said lay-on member after filling.
 8. A deviceaccording to claim 1 including a core member with at least a handleportion of substantially rigid form located within said lay-on memberand holding said lay-on member in an extended position, said fittingincluding a connection extending through said core member into the spacebetween said core member and said lay-on member to inflate said lay-onmember and means for also supplying the material to be applied to thespace between said core and said lay-on member, said lay-on memberhaving a plurality of openings therethrough for the exit of the materialunder the pressure of the inflation medium delivered through saidfitting.
 9. A device for the application of liquids, particularly highlyviscous liquids such as glue and the like, on workpiece faces,comprising an inflatable elastic bag forming a lay-on member having acoating surface for containing and transferring the liquid to be appliedand a rigid support fitting connected to and adjacent said bag forfilling and discharging an inflation medium into and out of said bag,said fitting comprising a tubular handle provided with an aeration anddeaeration valve.
 10. A device according to claim 9, wherein said lay-onmember comprises a rubber material.
 11. A device according to claim 9,wherein said lay-on member includes a plurality of projections on itssurface.
 12. A device according to claim 9, wherein said lay-on memberincludes a portion with an outer surface with raised parallel ribs. 13.A device according to claim 9, wherein at least a portion of the face ofsaid lay-on member is covered with an absorbent foam plastic.
 14. Adevice for the application of liquids, particularly highly viscousliquids such as glue and the like, on workpiece faces, comprising aninflatable elastic bag forming a lay-on member having a coating surfacefor containing and transferring the liquid to be applied and a rigidsupport fitting connected to and adjacent said bag for filling anddischarging an inflation medium into and out of said bag, said lay-onmember comprising a pocket shaped member having a mouth edge with anencircling bead, said fitting including a handle with a flange engagedwith the encircling bead and forming a seal therewith.